How do I reset measure properties for all measures?

I downloaded a piece I want to save as PDF and play on a music reader, but I want measure numbers.

The author turned them off, somehow, at the measure level -- the "Measure Number Mode" is set to "Always Hide". The styles (etc) are all OK. I can individually set a measure to "auto" and it shows.

But if I select all measures, then right click for measure properties, it re-selects only the current one. If I select all measures, inspector does not have any properties (along these lines).

Am I missing a way to do mass changes of these properties?

Linwood

PS. I realize by the time someone answers, even if quickly, I could do these one by one. But I'm hoping to learn something.